APIs & Databases

API3 provides data feeds for decentralized applications and says it pays dApps that use them.

For lakehouse architectures, Delta Lake provides an open-source storage framework with support for engines including Spark, Trino, and Hive.

Create Telegram bots using the Telegram Bot API HTTP server in this repository.

Build Telegram bots in PHP with this library based on the official Telegram Bot API.

Generate PDFs through a Node.js queue API with PDF Bot, which supports a CLI, S3 storage, and webhooks.

Twilio provides APIs for SMS, RCS, voice, and email, alongside conversational AI and identity verification.

An open-source HTTP mock server and validation proxy based on API specifications such as OpenAPI.

Distributed search and analytics are provided by Elasticsearch, an open-source engine for indexed data.

Create, search, and edit SQLite or SQLCipher database files with DB Browser, an open-source visual database tool.

A SQL database with Git-style version control, Dolt supports branching, merging, pushing, and pulling data.

Store key-value data in React Native apps with MMKV, a storage library for the framework.

A tool that provides a Model Context Protocol (MCP) server for any web application with an OpenAPI specification.

ParadeDB adds full text search, vector retrieval, and aggregations to PostgreSQL.

ZincSearch offers lightweight search and indexing software written in Go.

PocketBase provides an open-source backend in a single file with a realtime database, authentication, and file storage.

Bruno is an API client that stores collections as local files for use with Git and other version-control workflows. The open-source edition handles personal request testing and collection runs; paid editions add integrations and in-app conveniences.

X (Twitter) scraper API and Twitter MCP server to scrape tweets, profiles and followers. Not affiliated with X Corp.

SQLite database files can be opened and inspected with SQLite Viewer in a browser.

PostgreSQL vector search can use pgvecto.rs, an extension described as scalable and low latency.

Discover and scan APIs with APIKit, a Burp Suite plugin that parses API documentation for security testing.

Use Android system APIs from regular apps through Shizuku, which runs a Java process started with app_process.

Compose and send HTTP requests with this REST testing interface, which includes method, endpoint, and request options.

Meilisearch provides hosted or self-hosted search and AI retrieval for applications.

AI search and serving structured data are provided by Vespa, an open-source software platform.